Moho apicalis(O'ahu 'O'o),Extinct Since 1837:

Moho Bishopi(Bishop's 'O'o),Extinct Since 1904:


Chaetoptila angustipluma(Kioea),Extinct Since around 1859:
There is some mystery surrounding the cause of extinction of all of the Moho genus('O'o's),and the cause of extinction is not known for the Kioea.In fact,most Hawaiian natives didn't know that the Kioea existed! On the other hand, the 'O'o's were very well known and were hunted for their feathers. If you want to know more,check these links out:
Kaua'i 'O'o:http://en.wikipedia.org/wiki/Kaua‘i_‘Ō‘Å
Only known video of the Kaua'i 'O'o:
http://www.arkive.org/species/GES/birds/Moho_braccatus/Moho_braccatus_00.html?movietype=rpMed
Hawai'i 'O'o:http://en.wikipedia.org/wiki/Hawai‘i_‘Ō‘Å
Bishop's 'O'o:http://en.wikipedia.org/wiki/Moloka‘i_‘Ō‘Å
O'ahu 'O'o:http://en.wikipedia.org/wiki/O‘ahu_‘Ō‘Å
Kioea:http://en.wikipedia.org/wiki/Kioea